The United Nations Security Council has listed Salah Badi - commander of Al-Sumood Brigade - for sanctions that included a travel ban and asset freeze.
The UK said Friday that in coordination with the US & France - it has secured United Nations Security Council agreement to sanction Salah Badi under the terms of UN Security Council Resolution 2213 (2015).
We will continue to hold to account those seeking to undermine stability and security in Libya." The UK said in its statement.
Badi was a member of the Libyan General National Congress and a revolutionary leader in Misrata during February 17 revolution. He was also a leader in the Libya Dawn (Fajr Libya) operation against Dignity Operation of Khalifa Haftar in 2014.
The man was also one of the staunch rejection voices for the Libyan Political Agreement and its Presidential Council.
Badi was also one party of the recent clashes in Tripoli, which to many observers are the reason why he has been sanctioned.
"Salah Badi is the senior commander of the Al Somood Brigade, a militia opposed to the UN-recognised Government of National Accord. He has worked consistently to undermine a political solution in Libya." The UK's statement reads.
It adds that in August and September 2018, Salah Badi played a leading role in heavy clashes in Tripoli in which at least 120 people were killed, most of whom were civilians.
"This designation will subject Salah Badi to a travel ban and asset freeze, thereby sending a clear message from the international community that acts of violence against the Libyan people will not be tolerated." The statement further adds.
The UK also explained that it will not allow those seeking to obstruct peace and stability in Libya to act with impunity.
In the meantime, UNSMIL welcomed the sanctioning of Badi as a sign of commitment on the Security Council's part to hold accountable those toying with Libya's stability and threatening the security and safety of Libyans.